Fuse-box.



, No. 726,605. PATENTED APR. 28, 1903.

E. A. WILSON.

FUSE BOX.

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E. A. WILSON. FUSE BOX.

APPLIOATIOF FILED IA! 13, 1901. I 10 110mm. a sums-sun's.

"I E E lllllllll-lwi' I (jllllllllllllll No. 726,605. PATENTED APR. 28, 1903.

E. A. WILSON.

FUSE BOX. APPLIOATIOF FILED I AY 13, 1901. I0 IODEL. I I 3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

' ELMER nwmson, or NILES, oHIo;

FUSE-BOX.

SPECIFICATION forming part of Letters Patent No. 726,605, dated April 28, 1903.

Application filed May 13, 1901. Serial llo.l50,095. (No model-) To aZZ whom it may concern.-

Be it known that I, ELMER A. WILsoN, a citizen of the United States,residing at Niles, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Fuse-Boxes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain improvements in fuse-boxes or cut-outs generally, more especially to the class of mechanical circuit-breakers, as distinguished from magnetic circuit-breakers, wherein the break is caused by the lifting power or action of a solenoid. It has for its object, among other things, principally to not only open the circuit by separating the fuse-carrying levers, but also to break the circuit between said fuse-carrying levers and the contact-points therefor simultaneously with such opening of the circuit first referred to; to provideffor readily equipping the fuse-carrying levers or the placing in position thereon of the fuse with perfect safety; to so hold the fuse-carrying levers in position as to put the fuse under the required stress or tension, and to effect intimate or close engagement between the contact-points therefor in the electric circuit. It also provides for the obtainment of the maximum contactsurface, facility in placing in position the fuses, and promoting conductivity in connection with the fuse-carrying levers or their terminals, &c.

It consists of the novel features of construction and arrangement of parts, substantially as hereinafter more fully disclosed, and specifically pointed out by the claims.

In the accompanying drawings, illustrating the preferred embodiment of my invention, Figures 1 and 2 are plan views showing the same in different positions, preferably of single-pole double-break form. Fig.- 3 is a sectional elevation taken on the line as of Fig. 1. Fig. at is a cross-section. Figs. 5 and 6 are detached views showing the fuse in plan and side, respectively. Fig. 7 is a modification showing the carrying out of my invention in double-pole double-break form. Fig, 8 is a second modification showing a single -pole single-break form of the invention. Fig. 9 is still another modification disclosing a double-pole sin gle-break form of the same. Fig. 10 is a detailed side view of the connected safety-plug.

Latitude is allowed herein as to details, as they may be changed or varied at will without departing from the spirit of my invention and the same yet remain intact and be protected.

In carrying out my invention I provide a suitable casing or closure 1' to contain the operative parts or mechanism of my invention, havinga cover 1 suitably connected or bolted thereto, preferably as shown, said casing having a suitable insulating-base therein. Two levers 2, arranged the required distance apart upon upright pivots or fulcra 3, are provided upon their upper surfaces with short studs or terminals 2 one at each end, to permit of the carrying thereby of a fuse 4:, presently more fully described. The pivots or fulcra are preferably screwed into short plates 3, let into recesses or depressions 3", produced in the insulating-base. Said plates are themselves secured in place by means of screws 3, inserted through said base from the under side, with their heads let in to recesses 23 therein and their upper threaded portions engaging threaded apertures in said plates. Said threaded portions of said screws also project or stand above the base, as shown, to constitute stops, the purpose of which will presently appear. Upon the same pivots or fulcra 3 are also arranged down near'the base additional or supplemental levers 2 2, preferably rightangled, with their horizontal arms resting near the lower ends of said pivots and their vertical arms adapted to engage upstanding or correspondingportions of brackets or contact-points'5, held in position upon said insulating-base and suitably equipped to provide tact-points 5 when the fuse 4, connected thereto, is blown by means of the stops formed by the upward projecting ends of the screws 3, above described. Also arranged upon the pivots or fulcra 3 are springs 6, preferably helical or coiled, with the respective ends of each connected up with alever 2 and a lever 2, thus providing for exerting pressure in opposite directions upon said levers as said springs are put under the requisite tension or stress, as is apparent.

In the path of the movement of the levers 2 may be inserted in holes 7 in the insulating-base plugs 8, secured to a common bar 8, having a central ring or knob 8 to provide for temporarily holding said levers when putting the springs under tension and making connection between the levers 2 and the fuse at.

The fuse 4 is preferably constructed of a wire or strip metal 4, withits end portions 4 looped around a ring or terminal 4, adapted to be fitted or inserted upon the studs or terminals 2 of the fuse-carrying levers 2. Said wire or strip at its extreme ends is bent up from opposite sides thereof after having been passed or looped around said ring or terminal 4 over and down upon itself, giving the same a slight twist upon itself at the ends, which is rendered more effective against separation by applying solder thereto, as at 4. In lieu of making the fuse as just described the wire or strip and shells or cylinders may be produced in one piece or integral, as is obvious.

It will be noted that preliminary to putting the fuse in position the levers 2" separately are moved so as to isolate their upstanding ends out of engagement with and a short distance away from the contact-points of the brackets 5, which are so held by properly disposing or inserting the safety-plugs 8 into the holes 7 in the insulating-base in engagement with said levers. The levers 2 are next manipulated, being carried around in the direction of the arrows, as shown in Fig. 1, over the levers 2 and said contact-points and again brought around to their initial position. Thus the springs 6 are put under the requisite tension or stress and the fuse 4 now put in place, its terminals or tubes 4 being slipped upon the studs or terminals 2 of the levers 2. This done, the safety-plugs 8 are removed, permitting the levers 2 under the action or tension of the springs U to swing back in engagement with the contact-points 5, establishing the electric circuit.

It will be observed that when the fuse blows the levers 2 will by the action of springs 6 be forced still farther apart, and the levers 2 will swing away from the contact-points 5, being arrested from swinging around and again contacting with the parts 5 by the engagement with the stops furnished by the upper projecting ends of the screws 3 in the base. This wholly cuts out the current, rendering said parts perfectly dead, thus providing for complete immunity from the current when placing a new fuse in position.

In the modification of Fig. '7 is shown the double-pole double-break form of carrying out myinvention. In the modification of Fig. 8 is disclosed what may be termed a single pole single-break form of the invention, with afixed terminal 9, so-called, and in Fig. 9- is disclosed the carrying out of said invention in the double-pole single-break form, with the addition of supplemental springs 10 to the levers 2 all of the foregoing being improvised or contrived from the preferred showing of myinvention and which will be readily understood by those skilled in this art.

Having thus fully described my invention, whatI claim, and desire to secure by Letters Patent, is

1. In acircuit-breaker orfuse-box, the combination of fuse-carrying levers and supplemental levers, one of the former and one of the latter being arranged upon a common pivot and connected by a common spring, and means to establish a circuit in connection therewith, substantially as set forth.

2. In a circuitbreaker or fuse-box, the combination of a fuse-carrying lever, a supplemental lever and a contact-terminal adapted to be connected to the fuse-wire connected to the first-named lever, and means connecting up said fuse-carrying and supplemental le vers for reverse automatic movement thereof, substantially as set forth.

3. In a circuit-breaker or fuse-box, the combination of fuse-carrying levers and supplemental levers, one of each arranged upon a common pivot and connected by a common spring, said fuse-carrying levers provided with stud-terminals for the fuse, and means to establish in connection therewith a circuit, substantially as set forth.

4. In a circuit-breaker or fuse-box, the combination of pairs of levers, each pair arranged upon a common pivot and connected by a common spring, a fuse having ring-terminals adapted to be engaged with one lever of each pair of levers, and means to establish in connection therewith a circuit, substantially as set forth.

5. In a circuit-breaker, the combination of contact-points or brackets, pairs of levers, each pair arranged upon a common pivot and connected by a common spring, a fuse having a ring or tubular terminals adapted to be engaged with terminals of one of each pair of levers, and means to establish a circuit in connection therewith, substantially as set forth.

6. A circuitbreaker, comprising contactpoints or brackets with upstanding arms, pairs of levers, each pair arranged upon a common pivot and connected by a common spring, one of each pair of said levers having a corresponding or upstanding arm,a fuse connected up with the other lovers of said pairs, and temporary holding-plugs adapted to engage the levers having upstanding arms and holes in an insulating-base, substantially as set forth.

7. In a circuit-breaker or fuse-box, the combination of levers having fuse connection, additional eleotrically-connected-up levers, springs each having its respective ends connected to a pair of said levers, plates let into the insulating-lease, and securing screws or fastenings for said plates, with their upper IO ends adapted to form stops for the first-referred-to levers, substantially as set forth;

' In testimony whereof I affix my signature in presence of two witnesses.

ELMER A. W'ILSON.

Witnesses:

F. W. STILLWAG, R. L. MOOORKLE. 

